Device and armrest for adjusting the height of a support plate

Abstract

Device for adjusting the height of a support plate, comprising: a hydraulic system configured to support the mounting plate, and is configured to move along an axis to adjust the height of the support plate, and an activator that is connected to and configured with the hydraulic fluid to activate and control the hydraulic fluid to move along the axis, to adjust the height of the support plate, or to deactivate the hydraulic fluid, to stop at the set height, based on an initial external force on the activator.

Description

TECHNICAL AREA

[0001] Various embodiments relate to a device and an armrest for adjusting the height of a support section, for example a support plate. BACKGROUND

[0002] The following discussion of the background is provided solely for the purpose of better understanding the present disclosure. It is noted that this discussion does not constitute an endorsement or acknowledgment that the material in question was published, known, or part of the common knowledge of experts in the field at the time of the priority of the disclosure in any jurisdiction.

[0003] Traditionally, an armrest is used to support a user's arm, wrist, and / or hand while seated, such as in a chair. Such an armrest can provide increased comfort by reducing strain on the back, shoulders, and / or neck while seated. Traditional armrests are often adjustable to accommodate users of different heights and body proportions. For example, the height of the armrest may be adjustable to suit the user's needs.

[0004] However, conventional armrests can present some problems. For example, some conventional armrests offer stepless height adjustment, but this adjustment is achieved by rotating the armrest around a pivot point. While rotating the armrest raises or lowers its height, this rotation can also cause the armrest to move unintentionally forwards or backwards. This unintended movement can be inconvenient for the user, as they then have to make a second adjustment to correct it.

[0005] Another example is some other conventional armrests that use a sliding metal tube rail with multiple holes spaced apart in a straight line. The height of the armrest can be adjusted by attaching a corresponding locking mechanism to one of the holes. However, the armrest can develop play and looseness in a gap at the point where the locking mechanism attaches to one of the holes, especially when the armrest is pulled or pushed. Furthermore, the armrest may be limited in that its height can only be adjusted to preset heights.

[0006] Furthermore, the aforementioned conventional armrests may not offer a height indicator. Additionally, differences in component size can lead to variations in the height of the left and right armrests. Adjusting the armrest height may also be imprecise.

[0007] Therefore, there is a need for an improved device and an improved armrest that address at least one of the problems mentioned above. BRIEF INVENTION EXPLANATION

[0008] According to various embodiments, a device for adjusting the height of a support plate is provided, comprising: a hydraulic means configured to support the support plate and configured to move along an axis to adjust the height of the support plate, and an activator connected to the hydraulic means and configured to activate and control the hydraulic means to move along the axis to adjust the height of the support plate, or to deactivate the hydraulic means to stop at the set height, based on a first external force on the activator.

[0009] According to various embodiments, a device for displaying the height of a support plate, which is supported by a first support means and a second support means, is provided, comprising: a variable resistance, a guide connected to the first support means, a slide connected to the second support means and movably arranged on the guide, and a display electrically connected to the variable resistance, wherein a position of the slide on the guide is changed according to a movement of the first support means, the variable resistance is configured to detect a resistance depending on the changed position of the slide on the guide and to measure the height of the support plate based on the detection, and the display is configured to show the measured height of the support plate.

[0010] According to various embodiments, an armrest is provided comprising: a support plate configured to allow an object to rest upon it, and a device for adjusting the height of the support plate, comprising: a hydraulic means configured to support the support plate and configured to move along an axis to adjust the height of the support plate, and an activator connected to the hydraulic means and configured to activate and control the hydraulic means to move along the axis to adjust the height of the support plate, or to deactivate the hydraulic means to stop at the set height, based on a first external force on the activator. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In the drawings, identical reference numerals generally refer to the same parts in the different views. The drawings are not necessarily to scale but primarily serve to illustrate the principles of the invention. The following description details various embodiments with reference to the following drawings. These show: Fig. 1. A perspective view of a device and an armrest according to various embodiments, Fig. 2A to Fig. 2E Different perspective views of a device according to different embodiments, Fig. 3 a perspective view of a device and an armrest according to various embodiments, Fig. 4 a perspective view of a device and an armrest according to various embodiments, and Fig. 5 a perspective view of a device according to different embodiments. DESCRIPTION

[0012] The following detailed description refers to the accompanying drawings, which illustrate specific details and embodiments in which the disclosure can be implemented. These embodiments are described in sufficient detail to enable a person skilled in the art to implement the disclosure. Other embodiments may be used, and structural and logical modifications may be made, without departing from the scope of the disclosure. The various embodiments are not necessarily mutually exclusive, as some embodiments may be combined with one or more other embodiments to form new embodiments.

[0013] The disclosure described herein can be appropriately implemented without any element or elements, limitation or restrictions not expressly disclosed herein. For example, the terms "including," "including," "containing," etc., are to be understood broadly and without limitation. Accordingly, the word "including" or variations such as "shows" or "showing" is to be understood as implying the inclusion of a specified integer or group of integers, but not the exclusion of any other integer or group of integers.Furthermore, the terms and expressions used herein are descriptive and not restrictive, and there is no intention to exclude equivalents of the features shown and described, or parts thereof, by using such terms and expressions. Rather, it is acknowledged that various modifications are possible within the scope of the disclosure. Therefore, it is noted that although the present disclosure has been specifically described by means of exemplary embodiments and optional features, those skilled in the art may refer to modifications and variations of the disclosure set forth herein.

[0014] Features described in connection with one embodiment may be applicable to identical or similar features in other embodiments. Features described in connection with one embodiment may be applicable to other embodiments even if they are not explicitly described in those other embodiments. Furthermore, additions, combinations, and / or alternatives as described for a feature in connection with one embodiment may be applicable to the same or a similar feature in the other embodiments.

[0015] In the context of different embodiments, the articles "a", "an", and "the", "a", "a", used in relation to a feature or element, indicate one or more of the features or elements. As used here, the term "and / or" encompasses all combinations of one or more of the associated listed elements.

[0016] While terms like "first," "second," etc., can be used to describe different elements, these elements are not limited to the terms mentioned above. The terms mentioned above are used only to distinguish one element from another and do not define any order or meaning of the elements. Without compromising the scope of the description, a first element may be referred to as a second element, and vice versa.

[0017] It is understood that the terms “on”, “over”, “above”, “below”, “side”, “back”, “left”, “right”, “front”, “lateral”, “side”, “upwards”, “downwards”, etc. are used in the following description for the sake of simplicity and to better understand the relative positions or directions, and are not intended to restrict the orientation of a device, a structure or part of a device or structure.

[0018] The term “coupled” (or “connected”) can be understood here as mechanically coupled, for example attached or fixed, or simply in contact without any fixing, and it is understood that both direct coupling and indirect coupling (in other words: coupling without direct contact) may be provided.

[0019] Furthermore, the singular nouns "ein", "eine" and "der", "die", "das" also have plural forms unless the context clearly requires otherwise. Similarly, the word "oder" should also include "und" unless the context clearly requires otherwise.

[0020] As described above, the term "fluid" generally refers to substances that are in a liquid and / or gaseous state and furthermore includes substances that can flow. This can be liquids, such as fluids with a predetermined viscosity, for example, oil, or it can include a gas, for example, air (including ambient air, etc.).

[0021] As described above, the term "hydraulic means" generally refers to any hydraulic device capable of moving the support plate using a hydraulic principle or mechanism. This may include, for example, a system that has at least one fluid-based piston, such as a gas piston or a liquid piston. In some embodiments, there may be two pistons, which may be connected to each other via a fluid channel. The two pistons may be of the same size and thus configured to transfer force equally from one piston to the other. The pistons may be of different sizes and thus configured to convert distance into force or vice versa.Alternatively or additionally, the hydraulic device includes a hydraulic pump that can be configured to, for example, deliver pressurized fluid to one or more pistons, thereby moving the one or more pistons along an axis. In this way, the position of the support plate can be controlled.

[0022] To make the invention easy to understand and to enable its practical application, various embodiments will now be described using examples and without limitations, with reference to the figures.

[0023] Fig. Figure 1 shows a perspective view of a device 100 and an armrest 200 according to different embodiments. Fig. 2A to Fig. Figure 2E shows different perspective views of a device for adjusting the height of a support plate according to different embodiments.

[0024] With reference to Fig. 1 and Fig. 2A to Fig. In 2E, the device 100 can be provided for adjusting the height of a support section, e.g., a support plate 210 (also referred to as the "height of the armrest 200"). In some embodiments, the device 100 can be used with the support plate 210 to place an object on the support plate 210. In some embodiments, the armrest 200 can be provided, which includes the device 100 for adjusting the height of the support plate 210. In some embodiments, the armrest 200 can further include the support plate 210, which is supported by the device 100. In some embodiments, the armrest 200 can also, but is not limited to, include a body or housing (not shown) that surrounds at least one of the device 100 and the support plate 210.In some embodiments, the object can, without limitation, comprise at least a part of a user's body and at least a part of an object. For example, the at least part of the body can comprise, but is not limited to, an arm, a wrist, a hand, a leg, and a foot. For example, the object can be any object, such as a book, a cup, a tablet computer, or a laptop computer, that the user wishes to place on the support plate 210.

[0025] In some embodiments, the support plate 210 can be configured so that the object rests upon it. In some embodiments, the support plate 210 can be arranged on the device 100, and the height of the support plate 210 can be adjusted by the device 100. In some embodiments, the support plate 210 can have an upper support section 210A. The upper support section 210A can be an interchangeable top with magnetic coupling means, i.e., a magnetic PU (polyurethane) top for connecting to an upper support plate 210C. In some embodiments, the upper support section 210A can have a padded part, and the upper support plate 210C can be magnetically coupled to the padded part. It is noted that the padded part can be detachably attached to the upper support plate 210C.In some embodiments, the upper support plate 210C can be attached to a lower support plate 210B of the device 100. In some embodiments, the padded mat can be coated with antimicrobial materials or made of an antimicrobial fabric. In some embodiments, the upper support plate 210C can be made of a relatively rigid material that can withstand the weight of the object resting on it and exerting pressure upon it, for example, a human arm.

[0026] In some embodiments, a piece of furniture (not shown) may be provided. In some embodiments, the piece of furniture may be a chair or a vehicle seat.

[0027] The chair can be, for example, an office chair, a gaming chair, a dining chair, a bench, a wheelchair, a recliner, and a sofa, but is not limited to these. In some embodiments, the piece of furniture can have armrest 200. In some embodiments, the piece of furniture can further have a second armrest (not shown) which has a second support plate (not shown) and a second device (not shown) configured to support the second support plate. In some embodiments, the second device and the second support plate can have the same shape and configuration as device 100 and support plate 210, respectively. In some embodiments, armrest 200 can be referred to as the left armrest and the second armrest can be referred to as the right armrest, and vice versa.In some embodiments, the piece of furniture may also, but are not limited to, include a seat, a support component and a backrest.

[0028] As in Fig. As shown in Figure 1, the device 100 can include a hydraulic medium 110 and an activator 120. In some embodiments, the hydraulic medium shown in Figure 1 can be a hydraulic medium 110 and an activator 120. Fig. Device 100 shown provides a digital measurement of the height of the support plate 210. For example, the device shown in Fig. The device shown in Figure 100 can be referred to as the “caliper concept”.

[0029] In some embodiments, the hydraulic medium 110 can be arranged below the support plate 210. For example, the hydraulic medium 110 can be arranged below the lower support plate 210B of the device 100. In some embodiments, the hydraulic medium 110 can be connected directly or indirectly to the lower support plate 210B. For example, the hydraulic medium 110 can be attached to the lower support plate 210B. In some embodiments, the hydraulic medium 110 can be configured to support the support plate 210. In some embodiments, the hydraulic medium 110 can extend in a longitudinal direction. In some embodiments, the hydraulic medium 110 can be configured to move along an axis to adjust the height of the support plate 210.In some embodiments, the axis may be perpendicular (at an angle of 90 degrees) to a reference surface, such as a floor. For example, the hydraulic medium 110 may be configured to move up or down to adjust the height of the support plate 210. In some other embodiments, the axis may be any angle between 0 and 90 degrees with respect to the reference surface. In some embodiments, the floor may be, but is not limited to, an interior floor, an exterior floor, a vehicle floor, or the floor and surface of any object, such as a table. In some embodiments, the floor may be any reference surface on which the piece of furniture (containing the device 100) stands or lies.

[0030] In some embodiments, the activator 120 can be arranged below the support plate 210. For example, the activator 120 can be arranged adjacent to the lower support plate 210B. In some embodiments, the activator 120 can be connected directly or indirectly to the hydraulic medium 110. For example, the activator 120 can be connected directly or indirectly to a piston (not shown) of the hydraulic medium 110. The piston, which can be referred to as a fluid piston, can be a gas piston or a liquid piston containing a fluid, for example, oil. For example, the activator 120 can be connected directly or indirectly to the upper end of the hydraulic medium 110, which may be adjacent to the lower support plate 210B. In some embodiments, the activator 120 can be arranged on the outer tube 150.In some embodiments, the outer tube 150 may have an opening window 121 (hereinafter referred to as the "first opening window"), and the activator 120 may be connected to the gas or liquid piston of the hydraulic medium 110 via the first opening window 121.

[0031] In some embodiments, the activator 120 can be a triggering mechanism for the device 100. In some embodiments, the activator 120 can be configured to activate the hydraulic medium 110 to move from a current height to adjust the height of the support plate 210. In some embodiments, the activator 120 can be configured to be compressed (activated) in response to user input, for example, an external force (hereinafter referred to as the "first external force") applied to the activator 120. For example, when the activator 120 is compressed, it can activate the hydraulic medium 110 to move from the current height. In some embodiments, the activator 120 can be configured to deactivate the hydraulic medium 110 based on the first external force applied to the activator 120 (e.g., via a locking mechanism) to stop at the current height.In some embodiments, the activator 120 can be released from compression and return to a home position, for example, when the user releases the compression. For instance, when the activator 120 is released from compression, it can deactivate the hydraulic fluid 110 to stop its movement. In some embodiments, the activator 120 may have, but is not limited to, a trigger, a lever, and a handle. It should be noted that in some embodiments, other types of activator 120 may also be used, which can provide a required rotation angle range in response to user input.

[0032] In some embodiments, the activator 120 can be a control mechanism of the device 100 and may include a lever that actuates the activator 120 between a locked and an unlocked state. In some embodiments, the activator 120, when in the unlocked state, can be configured such that the hydraulic means 110 causes the support plate 210 to move along its axis by means of a hydraulic mechanism to adjust the height of the support plate 210. In some embodiments, the activator 120 can be configured to control the direction and magnitude of the movement of the hydraulic means 110 to adjust the height of the support plate 210 to a desired height, based on the first external force applied to the activator 120.For example, when the activator 120 is actuated, it can be configured to allow movement of the support plate 210 (or one of the components 210B, 210C) along the axis in a first direction (e.g., upwards), thus increasing the height of the support plate 210. As another example, when the activator 120 is moved into the unlocked state, it can be configured to allow a load to be applied to the support plate 210 to counteract the force of the hydraulic fluid, causing the support plate 210 to move in a second direction opposite to the first (e.g., downwards) along the axis, thereby decreasing the height of the support plate 210.In summary, the activator 120 can switch between an unlocked state, in which the hydraulic mechanism can move the device 100 along the first and second directions, and a locked state, in which the device 100 is held at a certain height.

[0033] In some embodiments, the device 100 may also include a height adjuster 130.

[0034] In some embodiments, the height adjuster 130 can be arranged below the support plate 210. In some embodiments, the height adjuster 130 can be connected directly or indirectly to the hydraulic medium 110. For example, the height adjuster 130 can be connected to a fluid cylinder (not shown) of the hydraulic medium 110 via a connecting part 222. For example, the height adjuster 130 can be connected to a lower end of the hydraulic medium 110 via the connecting part. In some embodiments, the height adjuster 130 can be connected to a connecting part 220, which is configured to connect the device 100 to a body of the piece of furniture, for example, the chair. In some embodiments, the height adjuster 130 can be connected to the connecting part 220 via the connecting part 222.

[0035] In some embodiments, the height adjuster 130 is configured to move the hydraulic medium 110 along the axis to adjust the height of the support plate 210 based on user input, for example, an external force applied to the height adjuster 130 (hereinafter referred to as the "second external force"). In some embodiments, the height adjuster 130 can be configured to control the direction and amount of movement of the hydraulic medium 110 to set the height of the support plate 210 to a desired height, based on the second external force on the height adjuster 130. In some embodiments, the height adjuster 130 can move the device 100, with the exception of the height adjuster 130, the lower mounting plate 210B, and the inner tube 140, along the axis using a height adjustment mechanism different from the hydraulic mechanism.In some embodiments, the height adjuster 130 can enable greater precision in adjusting the height of the support plate 210 (compared to the activator 120). In some embodiments, the height adjuster 130 may require specific thread dimensions to ensure the precise movement of the hydraulic medium 110 while simultaneously preventing the armrest 200 from slipping.

[0036] In some embodiments, the height adjuster 130 may, but is not limited to, a knob (e.g., a fine-adjustment knob), a rotary knob, a lever, and a handle. It is understood that in some embodiments, other types of height adjuster 130 may also be used, which can provide a required rotation angle range in response to user input. In some embodiments, the knob may, but is not limited to, an adjustable knob, a knob housing, and a leadscrew 224. In some embodiments, the leadscrew 224 may be welded to the connecting part 222, so that when the height adjuster 130 is rotated, the connecting part 222 and the leadscrew 224 can be displaced along a single axis.For example, the user can turn the adjustable knob housed in the knob casing, and the leadscrew connected to the adjustable knob can allow the hydraulic medium 110 to move along the axis, for example, up or down. In some embodiments, it is possible that when the height adjuster 130, for example, the knob, is turned in a third direction, the height adjuster 130 is configured to move the hydraulic medium 110 in the first direction (for example, upwards) along the axis, thus increasing the height of the support plate 210.In some embodiments, it is possible that when the height adjuster 130, for example the knob, is turned in a fourth direction opposite to the third direction, the height adjuster 130 is configured to move the hydraulic medium 110 in the second direction (for example downwards) along the axis, thus increasing the height of the support plate 210.

[0037] In some other embodiments, the activator 120 and the height adjuster 130 may not be connected to each other, and the activator 120 may not control the height adjuster 130, but rather the activation of the hydraulic medium 110. In some embodiments, the hydraulic medium 110 may further have a latch (not shown) (hereinafter referred to as the "first latch") configured to lock the hydraulic medium 110, for example the gas or liquid piston, when the activator 120 deactivates the hydraulic medium 110.For example, if the activator 120 deactivates the hydraulic medium 110, the activator 120 can control the first locking mechanism to fix the hydraulic medium 110, for example the gas or liquid piston, so that the hydraulic medium 110 cannot move, for example regardless of whether the height adjuster 130, for example the knob, is controlled by the second external force.

[0038] In some embodiments, the hydraulic medium 110 may include the fluid cylinder. In various embodiments, the fluid cylinder may be filled with a viscous liquid, for example, oil, and therefore be a fluid cylinder. In some embodiments, the fluid may be compressed. In some embodiments, the fluid cylinder may be filled with compressed gas and therefore be a gas cylinder. In some embodiments, the hydraulic medium 110 may further include the gas or liquid piston. In some embodiments, the gas or liquid piston may be configured to move along the axis, for example, up or down, within the fluid cylinder, based on the control of the activator 120. In some embodiments, the fluid cylinder may extend in the longitudinal direction.In some embodiments, the height adjuster 130 can be connected to the fluid cylinder via the connecting part. In some embodiments, a lower end of the fluid cylinder can be arranged adjacent to the connecting part 220. For example, the lower end of the fluid cylinder can be connected to the connecting part 220 via the connecting part. In some embodiments, the connecting part 220 can be sandwiched between the height adjuster 130 and the connecting part. In some embodiments, the gas or liquid piston can extend longitudinally. In some embodiments, an upper end of the gas or liquid piston can be arranged below the lower surface of the support plate 210. For example, the upper end of the gas or liquid piston can be attached to the lower support plate 210B.

[0039] In some embodiments, the activator 120 can control the direction of movement of the hydraulic medium 110, for example, the gas or liquid piston. In some embodiments where the hydraulic medium 110 is activated, when the activator 120 is controlled by the user to increase the height of the support plate 210, it can allow the gas or liquid piston to move in the first direction along the axis (for example, upwards), thus releasing the gas or liquid to generate the upward force. As the gas or liquid piston moves upwards, the support plate 210 can move upwards, thereby increasing its height.In some embodiments, where the hydraulic medium 110 is activated so that the activator 120 is controlled by the user to decrease the height of the support plate 210, the activator 120 can trigger the gas or liquid piston, thereby opening one or more valves to allow free movement of the gas or liquid around the gas or liquid piston. Such movement of the gas or liquid allows movement in the second direction along the axis (e.g., downwards). As the gas or liquid piston moves downwards, the support plate 210 can move downwards, thereby decreasing its height. In some embodiments, the height of the support plate 210 can thus be adjusted within the limits of the gas or liquid spring strokes (not shown) of the hydraulic medium 110.In some embodiments, the gas or liquid piston may require a fixed length to achieve the low force required for actuation. In some embodiments, the force range of the gas or liquid piston may be between 1 and 40 N. In some embodiments, the outer diameter of the gas or liquid piston may be between 10 and 30 mm.

[0040] In some embodiments, the activator 120 can control the amount of movement of the hydraulic medium 110, for example, the gas or liquid piston. In some embodiments, the amount of movement of the hydraulic medium 110 can depend on the time and / or the magnitude of the first external force on the activator 120. For example, the amount of gas released or trapped can depend on the time and / or the magnitude of the first external force on the activator 120. In another example, the amount of fluid displaced can depend on the velocity of the first external force on the activator 120. For example, a higher velocity can influence the amount of fluid displaced within the liquid piston housing.

[0041] In some embodiments, the device 100 may further, but is not limited to, have an inner tube 140 and an outer tube 150. In some embodiments, the outer tube 150 may be configured to support the support plate 210.

[0042] In some embodiments, the inner tube 140 can extend longitudinally. In some embodiments, the inner tube 140 can be arranged below the support plate 210. In some embodiments, the inner tube 140 can be arranged adjacent to the hydraulic medium 110. For example, a side surface of the inner tube 140 can be attached to a plate, for example, an aluminum plate, which can be attached to a side surface of the hydraulic medium 110, for example, the fluid cylinder. In some embodiments, a lower end of the inner tube 140 can be arranged adjacent to the connecting part 220. For example, the lower end of the inner tube 140 can be attached to the connecting part 220 via the connecting part.In some embodiments, the inner tube 140 cannot move along the axis, for example up or down, regardless of whether the hydraulic fluid 110 moves along the axis, for example up or down. It is noted that the plate that can be attached to the inner tube 140 can be made of various suitable metals or metal alloys.

[0043] In some embodiments, the outer tube 150 can extend longitudinally. In some embodiments, the upper end of the outer tube 150 can be located below the lower surface of the support plate 210. For example, the upper end of the outer tube 150 can be attached to the lower support plate 210B. In some embodiments, the outer tube 150 can surround at least a portion of the hydraulic medium 110 and at least a portion of the inner tube 140. In some embodiments, the outer tube 150 can surround at least a portion of the side surface of the hydraulic medium 110 and at least a portion of the side surface of the inner tube 140. In some embodiments, the outer tube 150 can be configured to move along the axis, for example, upwards or downwards, in accordance with the movement of the hydraulic medium 110.

[0044] In some embodiments, the device 100 may also include an indicator 170.

[0045] In some embodiments, the aforementioned "caliper concept" may include the indicator 170, which is configured to display the height, for example, a previous height, a current height, and / or a set height, of the support plate 210. In some embodiments, the indicator 170 may further be configured to measure the height of the support plate 210 in order to display its height. In some embodiments, the indicator 170 may display the measured height of the support plate 210.

[0046] As in Fig. As shown in Figure 1, the indicator 170 may in some embodiments include a linear guide 171, a sensor 172 (also referred to as a “sensor chip”) and a display 173, but is not limited to these.

[0047] In some embodiments, the linear guide 171 can be connected directly or indirectly to the inner tube 140. In some embodiments, the linear guide 171 can be attached to the inner tube 140. For example, a side surface of the linear guide 171 can be attached to the side surface of the inner tube 140. In some embodiments, the linear guide 171 can extend along the inner tube 140.

[0048] In some embodiments, the sensor 172 can be arranged on the outer tube 150. In some embodiments, the sensor 172 can be arranged adjacent to a lower end of the outer tube 150. In some embodiments, the sensor 172 can be arranged such that it can detect the linear guide 171.

[0049] In some embodiments, the sensor 172 can be configured to detect the linear guide 171. In some embodiments, the sensor 172 can have a capacitive linear encoder arrangement. In some embodiments, the sensor 172 can be configured to detect a position of the linear guide 171 relative to the sensor 172. For example, if the height of the support plate 210 is increased, the outer tube 150 can move along the axis, for example upwards, while the inner tube 140 does not move. The sensor 172, located on the outer tube 150, can detect the changed position of the linear guide 171 attached to the inner tube 140. In some embodiments, the sensor 172 can, but is not limited to, an infrared sensor (IR sensor), a radio frequency identification sensor (RFID sensor), a near-field communication sensor (NFC sensor), and an image sensor.In some embodiments, the linear guide 171 can have at least one element such that the sensor 172 can detect the position of the linear guide 171 as it changes relative to the sensor 172. For example, the linear guide 172 can have a plurality of RFID chips arranged vertically at intervals, and the sensor 172 can detect one of the plurality of RFID chips on the linear guide 172. In some embodiments, the sensor 172 can measure the height of the support plate 210 based on the detection by the sensor 172. For example, the sensor 172 can measure the height of the support plate 210 based on the one of the plurality of RFID chips that is detected.

[0050] In some embodiments, the display 173 can be arranged on the outer tube 150. In some embodiments, the display 173 can be arranged adjacent to the upper end of the outer tube 150. In some embodiments, the display 173 can be configured to show the height of the support plate 210, as measured by the sensor 172.

[0051] In some embodiments, the device 100 may further comprise a zero-function button 160. In some embodiments, the zero-function button 160 may be arranged below the support plate 210. For example, the zero-function button 160 may be arranged adjacent to the lower support plate 210B. In some embodiments, the zero-function button 160 may be directly or indirectly connected to the hydraulic medium 110. For example, the zero-function button 160 may be directly or indirectly connected to the gas or liquid piston of the hydraulic medium 110. For example, the zero-function button 160 may be directly or indirectly connected to an upper end of the hydraulic medium 110 that is adjacent to the lower support plate 210B. In some embodiments, the zero-function button 160 may be arranged on the outer tube 150.In some embodiments, the outer tube 150 may have an opening window 122 (hereinafter referred to as the "second opening window"), and the zero function button 160 may be accessible through the second opening window 122. For example, the user may access the zero function button 160 via the second opening window 122, for example, to turn the zero function button 160 on or off.

[0052] In some embodiments, the zero function key 160 may have a tactile button (not shown) and a mainboard (not shown). In some other embodiments, the zero function key 160 may not have its own mainboard and instead use the mainboard 174. In some embodiments, the zero function key 160 may be configured to calibrate the support plate 210 to the same height as any reference point (e.g., the underside of a table).

[0053] In some embodiments, the indicator 170 may further comprise a mainboard 174. In some embodiments, the mainboard 174 may serve as a data center for measurements of the height of the support plate 210. In some embodiments, the mainboard 174 may accommodate a plurality of electrical components. In some embodiments, the mainboard may be a printed circuit board (PCB) configured to interconnect the plurality of electrical components. In some embodiments, the plurality of electrical components may include, but is not limited to, a battery 175, a light source 176, and the sensor 172. In some embodiments, the plurality of electrical components may further comprise a processor (not shown) configured to control at least one of the light source 176, the sensor 172, and the indicator 173.In some embodiments, the processor may be a microcontroller unit (MCU) 174A. The MCU 174A may be configured to detect a resistance value and then convert it into the value to be displayed on the display 173.

[0054] In some embodiments, the light source 176 may be located on the mainboard 174. In some embodiments, the light source 176 may be directly or indirectly connected to the display 173. In some embodiments, the light source 176 may be a light-emitting diode (LED). In some embodiments, the light source 176 may be configured to emit light. In some embodiments, the light source 176 may be capable of producing a specific color of light. In some embodiments, the light source 176 may be configured to emit light based on whether the display 173 is turned on or off. For example, the processor may control the light source 176 to emit light of a predetermined color when the display 173 is turned on and to emit no light when the display 173 is turned off.In some embodiments, the light source 176 may be able to selectively generate a plurality of light colors. As another example, the processor may control the light source 176 to emit light in a predetermined first color, for example, green, when the display 173 is switched on, and not to emit light in a predetermined second color, for example, yellow, when the display 173 is switched off. In some embodiments, the processor may control the light source 176 to emit light in a predetermined third color, for example, red, when the battery 175 does not have sufficient power.

[0055] In some embodiments, the battery 175 can power at least one of the light source 176, the sensor 172, and the display 173. In some embodiments, the battery 175 can be a rechargeable battery or a non-rechargeable, replaceable battery. For example, the battery 175 can be, but is not limited to, a button cell battery.

[0056] In some embodiments, the Fig. 2A to Fig. Device 100 shown in Figure 2E provides a digital measurement of the height of the support plate 210. For example, the device shown in Figure 2E can be used to measure the height of the support plate 210. Fig. 2A to Fig. The device shown in Figure 2E has a variable resistor. In some embodiments, the variable resistor may be a linear potentiometer, and obtaining the digital measurement may be referred to as the “linear potentiometer concept”.

[0057] In some embodiments, the device 100, although not shown, may include a hydraulic medium 110, an activator 120, and a height adjuster 130, as described in relation to Fig. 1 described. In some embodiments, the device 100 may further comprise an indicator 170, as described in Fig. 2A to Fig. 2E shown. In some embodiments, although not shown, an armrest 200 may be provided which supports the device 100 and a support plate 210, as shown in relation to Fig. 1 described, may have, but is not limited to. In some embodiments, although not shown, a piece of furniture, for example a chair, may be provided which may have the armrest 200.

[0058] In some embodiments, the device 100 may further comprise an inner tube 140 and an outer tube 150, as described in relation to Fig. 1 described. In some embodiments, the device 100 may further have a zero-function button 160, as described in relation to Fig. 1 described.

[0059] As in Fig. 2A to Fig. As shown in Figure 2E, the indicator 170 can be configured to display the height, for example, the current height and the set height, of the support plate 210. In some embodiments, the indicator 170 can further be configured to measure the height of the support plate 210 in order to display its height. In some embodiments, the indicator 170 can display the measured height of the support plate 210.

[0060] As in Fig. 2A to Fig. As shown in Figure 2E, the indicator 170 may in some embodiments include a linear potentiometer 177 and a display 173, but is not limited to this.

[0061] In some embodiments, the linear potentiometer 177 can be directly or indirectly connected to the outer tube 150. In some embodiments, the linear potentiometer 177 can be attached to the outer tube 150. For example, a side face of the linear potentiometer 177 can be attached to a side face of the outer tube 150. In some embodiments, the linear potentiometer 177 can extend along the outer tube 150. In some embodiments, the linear potentiometer 177 can extend longitudinally. In some embodiments, the linear potentiometer 177 can be arranged under a lower support plate 210B of the device 100. The linear potentiometer 177 can be controlled by a microcontroller.

[0062] In some embodiments, the linear potentiometer 177 can have a guide 177a and a slide 177b. In some embodiments, the guide 177a can extend longitudinally. In some embodiments, the guide 177a can have the form of an elongated recess and provide a path for the slide 177b. In some embodiments, the guide 177a can be directly or indirectly connected to the outer tube 150. In some embodiments, the guide 177a can move along an axis, for example, upwards or downwards, in accordance with the movement of the hydraulic fluid 110 and the outer tube 150.

[0063] In some embodiments, the slide 177b can be connected directly or indirectly to the inner tube 140. In some embodiments, the slide 177b can be attached to the inner tube 140. For example, a side face of the slide 177b can be attached to a side face of the inner tube 140. In some embodiments, the slide 177b can be movably arranged on the guide 177a of the linear potentiometer 177. In some embodiments, the position of the slide 177b on the guide 177a can be changed according to the movement of the outer tube 150, since the inner tube 140 may not move independently of the movement of the hydraulic fluid 110 and the outer tube 150.

[0064] In some embodiments, the linear potentiometer 177 can be configured to detect the position of the slide 177b arranged on the guide 177a of the linear potentiometer 177. For example, if the height of the support plate 210 is increased, the outer tube 150 may move in a first direction (e.g., upwards), while the inner tube 140 remains stationary. The linear potentiometer 177, arranged on the outer tube 150, can detect the changed position of the slide 177b on the guide 177a of the linear potentiometer 177. In some embodiments, the linear potentiometer 177 can detect a resistance that may depend on the position of the slide 177b. In some embodiments, the linear potentiometer 177 can measure the height of the support plate 210 based on the detected resistance.

[0065] In some embodiments, the indicator 173 can be arranged on the outer tube 150. In some embodiments, the indicator 173 can be arranged adjacent to an upper end of the outer tube 150. In some embodiments, the indicator 173 can be configured to display the height of the support plate 210, which is measured by the linear potentiometer 177.

[0066] In some embodiments, the display 170 may further comprise a mainboard 174 which accommodates a plurality of electrical components, as described with reference to Fig. 1 described, but is not limited thereto. In some embodiments, the majority of electrical components can be a battery 175, as described with reference to Fig. 1 described, a light source 176, as with reference to Fig. 1 described, and featuring the linear potentiometer 177, but is not limited thereto. Although not shown, the majority of electrical components may further include a processor configured to perform at least one of the functions described with respect to Fig. 1 the described light source 176, the display 173 and the linear potentiometer 177.

[0067] In some other embodiments, a device 100 for indicating the height of the support plate 210 may be provided, which is supported by a first support means (also referred to as the "outer tube") 150 and a second support means (also referred to as the "inner tube") 140. The device 100 may comprise: the linear potentiometer 177, having a guide 177a connected to the first support means 150, and the slide 177b, which is connected to the second support means 140 and is movably arranged on the guide 177a. The device 100 may further comprise the indicator 173, which is electrically connected to the linear potentiometer 177. The position of the slide 177b on the guide 177a can be changed according to the movement of the first support means 150.The linear potentiometer 177 can be configured to detect a resistance depending on the changed position of the slider 177b on the guide 177a and to measure the height of the support plate 210 based on the detection, and the display 173 can be configured to display the measured height of the support plate 210.

[0068] Fig. Figure 3 shows a perspective view of a device 100 and an armrest 200 according to various embodiments. In some embodiments, the Fig. Device 100 shown in Figure 3 provides a mechanical measurement of the height of the support plate 210. For example, the device shown in Figure 3 can be used to measure the height of the support plate 210. Fig. The device shown in Figure 3 can be referred to as the “rack and pinion concept”.

[0069] Although not shown, the device 100 may include a hydraulic medium 110, an activator 120 and a height adjuster 130, as described in relation to Fig. 1 described. In some embodiments, the device 100 may further comprise an indicator 170, as described in Fig. 3 shown. In some embodiments, the armrest 200 may be provided, which includes the device 100 and a support plate 210, as shown in relation to Fig. 1 described, but is not limited to. In some embodiments, although not shown, a piece of furniture, for example a chair, may be provided which may have the armrest 200.

[0070] In some embodiments, the device 100 may further comprise an inner tube 140 and an outer tube 150, as described in relation to Fig. 1 described. In some embodiments, the device 100 can provide a zero function to calibrate the support plate 210 to a height that corresponds to any reference point (for example, the underside of a table).

[0071] As in Fig. As shown in Figure 3, the indicator 170 can be configured to display the height, for example, a current height and a set height, of the support plate 210. In some embodiments, the indicator 170 can have a linear rack 178 and a pinion 179.

[0072] In some embodiments, the linear rack 178 can be connected directly or indirectly to the inner tube 140. In some embodiments, the linear rack 178 can be attached to the inner tube 140. For example, a side face of the linear rack 178 can be attached to a side face of the inner tube 140. In some embodiments, the linear rack 178 can extend along the inner tube 140. In some embodiments, the linear rack 178 can extend longitudinally. In some embodiments, the linear rack 178 can be arranged under a lower support plate of the device 100. In some embodiments, the linear rack 178 cannot move along an axis, for example, upwards or downwards, independently of the movements of the hydraulic medium 110 and the outer tube 150.

[0073] In some embodiments, the pinion 179 can be connected directly or indirectly to the outer tube 150. In some embodiments, the pinion 179 can be attached to the outer tube 150. For example, the pinion 179 can be attached to a side face of the outer tube 150. In some embodiments, the pinion 179 can be located below the lower support plate. In some embodiments, the pinion 179 can rotate and move along the axis in accordance with the movements of the hydraulic fluid 110 and the outer tube 150, for example, upwards or downwards.

[0074] In some embodiments, the linear rack 178 can have a plurality of teeth 178a. For example, each of the plurality of teeth 178a can be arranged at intervals in a vertical direction in a straight line. In some embodiments, the pinion 179 can have a pinion body 179a and an indicator element 179b attached to the pinion body 179a. In some embodiments, the pinion body 179a can be attached to the outer tube 150. In some embodiments, the pinion body 179a can be configured to rotate and move along the linear rack 178 when the hydraulic fluid 110 and the outer tube 150 move. In some embodiments, the pinion body 179a can be configured to rotate and move along the linear rack 178 together with the indicator element 179b, since the pinion body 179a can be attached to the indicator element 179b.In some embodiments, the pinion body 179a can move and rotate along the plurality of teeth 178a while the hydraulic medium 110 and the outer tube 150 are moving. When the hydraulic medium 110 and the outer tube 150 cease to move, the pinion body 179a can engage with one of the plurality of teeth 178a. In some embodiments, the indicator element 179b can indicate a relative change in position between the indicator element 179b and the plurality of teeth 178a corresponding to the movements of the hydraulic medium 110 and the outer tube 150. For example, the indicator element 179b can indicate which tooth from the plurality of teeth 178a is engaged with the pinion body 179a. The tooth engaged with the pinion body 179a can be considered an indicator of the height of the support plate 210.

[0075] Fig. Figure 4 shows a perspective view of a device 100 and an armrest 200 according to various embodiments. In some embodiments, the Fig. Device 100 shown in Figure 4 provides a mechanical measurement of the height of the support plate 210. For example, the device shown in Figure 4 can be used to measure the height of the support plate 210. Fig. The device shown in Figure 4 can be referred to as the “measuring tape concept”.

[0076] Although not shown, the device 100 may comprise a hydraulic medium 110, an activator 120 and a height adjuster 130, as described with reference to Fig. 1 described. In some embodiments, the device 100 may further comprise an indicator 170, as described in Fig. 4 shown. In some embodiments, the armrest 200 may be provided, which includes the device 100 and a support plate 210, as shown with reference to Fig. 1 described, may have, but is not limited to. In some embodiments, although not shown, a piece of furniture, for example a chair, may be provided which may have the armrest 200.

[0077] In some embodiments, the device 100 may further comprise an inner tube 140 and an outer tube 150, as described with reference to Fig. 1 described. In some embodiments, the device 100 can provide a zero function to calibrate the support plate 210 to a height that corresponds to any reference point (for example, the underside of a table).

[0078] As in Fig. As shown in Figure 4, the indicator 170 can be configured to display the height, for example the current height and the set height, of the support plate 210. In some embodiments, the indicator 170 may, but is not limited to, an opening window 181, a first gear 182a, a second gear 182b, a belt 183, and a measuring tape 184.

[0079] In some embodiments, the opening window 181 can be formed on the outer tube 150. For example, the opening window 181 can be formed on an upper part of the outer tube 150.

[0080] In some embodiments, the first gear 182a and the second gear 182b can be arranged between the outer tube 150 and the inner tube 140. In some embodiments, the first gear 182a and the second gear 182b can be attached to the outer tube 150. In some embodiments, the belt 183 can be attached to the inner tube 140. In some embodiments, the belt 183 can be wound around the first gear 182a and the second gear 182b and configured to move in accordance with the rotations of the first gear 182a and the second gear 182b caused by the movement of the hydraulic fluid 110 and the outer tube 150. In some embodiments, the measuring tape 184 can be attached to the belt 183, and thus the measuring tape 183 attached to the belt 183 can be attached to the inner tube 140 and configured to move along the movement of the belt 183.In some embodiments, the measuring tape 184 and the strap 183 can be made of a flexible material, for example a fabric.

[0081] In some embodiments, a plurality of dimension indicators (not shown) can be displayed on the measuring tape 184. For example, each of the plurality of dimension indicators can be arranged vertically in a straight line at intervals from one another. In some embodiments, a portion of the measuring tape 184 can be visible through the opening window 181. For example, at least one dimension indicator from the plurality of dimension indicators can be visible through the opening window 181. In some embodiments, the opening window 181 can be configured to display the at least one dimension indicator from the plurality of dimension indicators shown on the measuring tape 184, such as the height, for example, the set height of the support plate.

[0082] In some embodiments, the measuring tape 184 attached to the belt 183 can move in accordance with the movements of the hydraulic fluid 110 and the outer tube 150. For example, when the hydraulic fluid 110 and the outer tube 150 move, the first gear 182a and the second gear 182b can rotate, and the measuring tape 184 attached to the belt 183 can move. When the measuring tape 184 attached to the belt 183 moves, the at least one measuring indicator visible through the opening window 181 can change. In this respect, the at least one measuring indicator visible through the opening window 181 can be considered an indicator of the height of the support plate 210.

[0083] Fig. Figure 5 shows a perspective view of a device 100 according to various embodiments. In some embodiments, the Fig. Device 100 shown in section 5 provides a mechanical measurement of the height of the support plate 210. For example, the device shown in Fig. The device shown in Figure 5 can be described as a “physical linear indicator concept”.

[0084] Although not shown, the device 100 may comprise a hydraulic medium 110, an activator 120 and a height adjuster 130, as described with reference to Fig. 1 described. In some embodiments, the device 100 may further comprise an indicator 170, as described in Fig. 5 shown. In some embodiments, although not shown, an armrest 200 may be provided which supports the device 100 and a support plate 210, as described with reference to Fig. 1 described, may have, but is not limited to. In some embodiments, although not shown, a piece of furniture, for example a chair, may be provided which may have the armrest 200.

[0085] In some embodiments, the device 100 may further comprise an inner tube 140 and an outer tube 150, as described with reference to Fig. 1 described.

[0086] As in Fig. As shown in Figure 5, the indicator 170 can be configured to display the height, for example, a current height and a set height, of the support plate 210. In some embodiments, the indicator 170 can have an opening window 181, a fixed indicator 185, and a plurality of dimension indicators 186, but is not limited to these.

[0087] In some embodiments, the opening window 181 can be formed on the outer tube 150. For example, the opening window 181 can extend in a longitudinal direction. In some embodiments, the opening window 181 can be formed along the outer tube 150.

[0088] In some embodiments, the fixed indicator 185 can be displayed on the outer tube 150. In some embodiments, the fixed indicator 85 can be displayed by printing, stamping, engraving, affixing a sticker, and / or embossing. In some embodiments, the fixed indicator 185 can be positioned on the outer tube 150 adjacent to the opening window 181.

[0089] In some embodiments, the plurality of gauge indicators 186 can be displayed on the inner tube 140. In some embodiments, the plurality of gauge indicators 186 can be displayed by printing, stamping, engraving, embossing, applying a sticker, and / or debossing. In some embodiments, each of the plurality of gauge indicators 186 can be arranged in a straight line in a vertical direction at intervals from one another. In some embodiments, the plurality of gauge indicators 186 can be visible through the opening window 181.

[0090] In some embodiments, the fixed indicator 185 can be positioned on the outer tube 150 adjacent to the plurality of gauge indicators 186, so that the fixed indicator 150 can point to one of the plurality of gauge indicators 186 or to a gap between two of the plurality of gauge indicators 186 (hereinafter referred to as the "corresponding gauge indicator"), at any set height of the support plate 210. For example, the fixed indicator 185 can be aligned with the corresponding gauge indicator.

[0091] In some embodiments, the opening window 181 can be configured to indicate a relative change in position between the fixed indicator 185 and the plurality of dimension indicators 186 corresponding to the movements of the hydraulic medium 110 and the outer tube 150, such as the height, for example the set height of the support plate 210.

[0092] In some embodiments, the fixed indicator 185 can move in accordance with the movements of the hydraulic fluid 110 and the outer tube 150. For example, when the hydraulic fluid 110 and the outer tube 150 move, the fixed indicator 185 moves. When the fixed indicator 185 moves, the corresponding dimension indicator can change. In this respect, the changed corresponding dimension indicator can be considered as indicating the height of the support plate 210.

[0093] As described above, the device 100, according to various embodiments, can provide stepless height adjustment by using a vertical movement to adjust the height of the support plate 210 instead of a rotary movement. Furthermore, according to various embodiments, the device 100 can allow the support plate 210 to move steplessly between a lower and a higher height position by using the hydraulic means 110 to adjust the height of the support plate 210.

[0094] Furthermore, according to various embodiments, the device 100 can provide high precision in the height adjustment of the support plate 210, for example by using the height adjuster 130. In addition, according to various embodiments, the device 100 can provide high precision in measuring the height of the support plate 210, for example by using a battery-operated electronic high-precision height measuring device (e.g., the one described in relation to Fig. 1 and Fig. 2 described indicator 170) or by using mechanical elements (e.g. the one relating to Fig. 3 to Fig. 5 described indicator 170) which can improve the function of the hydraulic fluid 110.

[0095] Furthermore, according to various embodiments, the device 100 can provide a display of the height of the support plate 210. Therefore, the user can determine the height of an armrest, for example, the left armrest, of the chair and precisely adjust both armrests, for example, the left and right armrests, to a desired and / or identical height.

[0096] Although the disclosure is shown and described with reference to certain embodiments, those skilled in the art should recognize that various changes in form and detail can be made without departing from the spirit and scope of the disclosure as defined by the appended claims. The scope of the disclosure is thus specified by the appended claims, and all modifications within the meaning and equivalence of the claims are therefore intended to be included.

Claims

[1] Device for adjusting the height of a support plate, comprising: a hydraulic system configured to support the mounting plate, and is configured to move along an axis to adjust the height of the support plate, and an activator that is connected to and configured with the hydraulic fluid to activate and control the hydraulic fluid to move along the axis, to adjust the height of the support plate, or to deactivate the hydraulic fluid, to stop at the set height, based on an initial external force on the activator. [2] Device according to claim 1, further comprising a height adjuster connected to the hydraulic means and configured to move the hydraulic means along the axis to adjust the height of the support plate based on a second external force on the height adjuster. [3] Device according to claim 2, further comprising an indicator configured to display the set height of the support plate. [4] Device according to claim 3, wherein the hydraulic medium comprises: a fluid cylinder filled with compressed fluid and a piston configured to move along the axis in the fluid cylinder, based on the control of the activator. [5] Device according to claim 4, wherein the height adjuster has a knob which is connected to the fluid cylinder via a connecting part and is configured to move the hydraulic medium along the axis to adjust the height of the support plate based on the second external force on the knob. [6] Device according to claim 5, wherein, when the hydraulic means is activated by the activator, the activator is configured to control the piston to move in a first direction, or to allow a load applied to the support plate to oppose the movement of the piston in a second direction, the second direction being opposite to the first direction. [7] Device according to claim 6, wherein the hydraulic means further comprises a locking mechanism, and, When the hydraulic fluid is deactivated by the activator, the locking mechanism is configured to fix the piston in place so that it cannot move. [8] Device according to claim 3, further comprising: an inner tube that is located below the support plate and adjacent to the hydraulic fluid, and an outer tube, which surrounds at least part of the hydraulic medium and at least part of the inner tube, is configured to support the support plate, and is configured to move in accordance with the movement of the hydraulic fluid. [9] Device according to claim 8, wherein the indicator is further configured to measure the set height of the support plate, to indicate the set height of the support plate. [10] Device according to claim 9, wherein the indicator comprises: a linear guide connected to the inner tube, a sensor connected to the outer tube, and a display configured to show the set height of the support plate, wherein the sensor is configured to detect a position of the linear guide relative to the sensor and to measure the set height of the support plate based on the detection. [11] Device according to claim 10, further comprising a zero function button arranged and configured on the outer tube to calibrate the support plate to a reference point. [12] Device according to claim 10, wherein the indicator further comprises a main board which accommodates at least one of a battery, a light source and the sensor. [13] Device according to claim 12, wherein the light source is configured to emit light based on whether the display is turned on or off. [14] Device according to claim 9, wherein the indicator comprises: a linear potentiometer that features: a guide connected to the outer tube and a slide that is connected to the inner tube and movably arranged on the guide, and a display configured to show the set height of the support plate, wherein the position of the slider on the guide is changed according to the movement of the outer tube and The linear potentiometer is configured to detect a resistance depending on the changed position of the slider on the guide and to measure the set height of the support plate based on the detection. [15] Device according to claim 8, wherein the indicator comprises: a linear rack connected to the inner tube, having a plurality of teeth, and a pinion comprising a pinion body connected to the outer tube and an indicator element connected to the pinion body, wherein the pinion body, together with the indicator element, is configured to move along the linear rack in accordance with the movement of the outer tube and to engage with one of the majority of teeth, and The indicator element is configured to show a relative change in position between the indicator element and the majority of teeth corresponding to the movements of the outer tube and the pinion body as the set height of the support plate. [16] Device according to claim 8, wherein the indicator comprises: an opening window on the outer pipe, a first gear and a second gear connected to the outer tube, a belt connected to the inner tube, which is looped around the first and second gears and is configured to move in accordance with the rotations of the first and second gears by the movement of the outer tube, and a measuring tape attached to a strap, where a plurality of measurement indicators are shown on the measuring tape and The opening window is configured to display at least one measurement indicator from the majority of measurement indicators specified on the measuring tape as the set height of the support plate. [17] Device according to claim 8, wherein the indicator comprises: an opening window on the outer pipe, where a fixed indicator is displayed on the outer tube, a plurality of gauges are displayed on the inner tube and are visible through the opening window, and The opening window is configured to indicate a relative change in position between the fixed indicator and the majority of measuring indicators according to the movement of the outer tube as the set height of the support plate. [18] Device for indicating the height of a support plate which is supported by a first support means and a second support means comprising: exhibiting a variable resistance: a guide connected with the first support means, and a slide that is connected to the second support means and is movably arranged on the guide, and a display that is electrically connected to the variable resistor, wherein the position of the slider on the guide is changed according to a movement of the first support means, The variable resistor is configured to detect resistance depending on the changed position of the slider on the guide and to measure the height of the support plate based on the detection, and The display is configured to show the measured height of the support plate. [19] Armrest, having: a support plate configured so that an object can rest on it, and a device for adjusting the height of the support plate, comprising: a hydraulic means configured to support the support plate and configured to move along an axis to adjust the height of the support plate, and an activator connected to the hydraulic medium and configured to activate and control the hydraulic medium to move along the axis to adjust the height of the support plate, or to deactivate the hydraulic medium to stop at the set height, based on an initial external force applied to the activator. [20] Armrest according to claim 19, wherein the device further comprises a height adjuster connected to the hydraulic means and configured to move the hydraulic means along the axis to adjust the height of the support plate based on a second external force on the height adjuster.

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